470 



THE CARBONIFEROUS SYSTEM. 



even in the most favourable cases ; while there is evidence that in the 

 Carboniferous period many forests may have flourished for centuries 

 without producing an inch of coaly matter. 



Summary of Co?iclusions. — In illustration of the bearing of these 

 facts on the questions relating to the materials of the coal, I give the 

 following table, representing in a condensed form the results of my 

 observations on the coals of the South Joggins : — 



Table showing the Relative Frequency of Occurrence of Genera of 

 Plants and Animals in the Coals of the South Joggins. 



Name of Fossils. 



Plants. 



Sigillaria occurs in 



Cordaites „ 



Filices (mostly Alethopteris 



lonchitica) „ 



Lepidodendron and Lepido- 



phloios „ 



Calaraites „ 



Carpolites, etc „ 



Asterophyllites „ 



Calamodendron „ 



Structures. 

 Vascular bundles of ferns ... „ 



Bast tissue {Sigillaria) „ 



Epidermal tissue {Cordaites, 



^ etc.) „ 



Scalariform {Sigil., Stig., Le- 



pidod., etc.) ' „ 



Discigerous {Sigillaria and 



Dadoxylon, etc.) „ 



Reticulated {Catamites, 



Ferns, etc.) „ 



Animals. 



Fishes {Palaoniscus, Rhizo- 



dus, etc.) „ 



Naiadites {Anthracomya, etc.) „ 



Spirorbis carbonarius „ 



Cythere 



Insects (?) 



Reptiles {Dendrerpeton, etc.) „ 

 Pupa vetusta and Xylobius 

 sigillaricB 



Division 3. 



23 coals. 



} 



} 



13 

 15 



} 



I 



} 



4 

 2 

 1 



8 

 2 



6 

 1 



1 



Division 4. 

 49 coals. 



I 



34 

 26 



17 



15 



12 

 9 

 2 



1 



22 



16 



6 

 9 

 8 

 2 



16 



16 



16 



13 



3 



1 



Division 6. 

 9 coals. 



2 

 2 



1 

 1 



1 



1 



1 



Total. 

 SI coals 



49 

 41 



23 



16 



16 



11 



3 



1 



30 

 20 



12 



11 



10 



3 



18 



17 

 16 

 14 



3 



1 



